Ejecting mechanism



NOV- 24, 1931. A. G. RAvENscHLAG ET AL 1333,659

EJECTING MECHANI SM Filed Dec. 26, 1929 2 SheetS-Sheet l W w w a A w 7 w an 2.5 ma z NOV- 24, 1931. A. G. RAvENscHLAG ET AL 1,8'335'9 EJECTNG MECHANISM Filed Dec-.726. 1929 2 sneets-sneez 2 Patented Nov. 24, 1931 UNITED STATES PATENT orFicE ALFRED G. RAVENSCHLAG, OF CHICAGO, AND FRANCIS P. TIKALSKY, OF LA GRANGE,

ILLINOIS, ASSIGNORS T0 WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK EJECTING MECHANISM Application file December 26, 1929. Serial No. 416,448.

tion is designed to be applied to a power.

driVen die casting machine of the type wherein a stationary die half and a movable d1e half cooperate to form a plurality of molds which, when the two die halves .are brought togetherA in cooperative relatlon, recelve molten' metal under pressure to form the castings, which castings are e]ected by eJecting pins after the die halves are separated.

The invention is more particularly applicable to the formation of castings having projecting portions or inserts of such length as to make ej ecting by means Vof the usual e]ect1ng mechanism difcult or impossible. In one embodiment of the invention, a plurality of adjustable cam members actuate a stop member to move it, during withdrawal of the movable die half, into the path of a hand lever i which is normally usedjto operate the ejecting mechanism, so as to cause the hand lever to be actuated by the power furnished to the machine rather than manually. When the castings have been partially ejected from the die, the stop member is automatically moved to inoperative position and the ejecting ,operation may be completed by hand if necessary.

Furtherobjects of the invention will appear from the following description, taken in connection with the appended drawings, in

Fig. 4`is an enlarged elevational view of an article produced by the machine.

'Beferring more particularly to the drawings, the reference numeral 10 indicates a tie rod to Vwhich a plate 12 is adjustably fiXed by means of clamps 13, 14. A stop member 16 is slidably mounted transversely of the plate 12 and is held against movement in any direction other than 'longitudinal by means of a bracket 18 adjustably secured to the plate 12 by means of bolts 20.

A pair of cam plates 21, 22 are adjustably secured to the movable bolster plate 24 of the machine by means of bolts 26, 27 which pass through slots 28, 29 formed in the cam plates and are designed to cooperate with a roller 30 carried by a stud 32 mounted at the end of the stop member 16. It will be seen that as the movable bolster plate 24 is reciprocated it will carry cam plates 21 and 22 past the roller 30, and the inclined cam surfaces of the plates will cause the stop member 16 to move alternately inwardly and outwardly.

The movable die half 84 of the machine is secured to the movable bolsterplate 24 in spaced relation by means of four arms 36 secured respectively to the four Corners of a die shoe 37 which is secured to the bolster plate, only one arm being shown in the drawings. It will thus be seen that as the movable bolster plate is reciprocated by means (not shown) but known in the art, the die half 34 will alternately be moved to the position shown in full lines and to the position indicated at 38 in dotted lines in Fig. 2, where it cooperates with a fixed die half 39 to form a plurality of molds for receiving molten metal.

An ejector plate 40 is movably mounted between die shoe and die half 34 by means of rods 42 slidable in bores (not shown) in the die shoe, and is designed to be reciprocated by means of a rack 44 fixed to the ejector plate and engaging a pinion 45 which is keyed to a shaft 46 journaled in the die shoe. A hand lever 48 is keyed to shaft 46 to rotate it and thereby reciprocate the ejector plate 40. The ejector plate at its forward surface is provided with a plurality of ejector pins 50 which extend into cylindrical bores formed in the movable die half for the purpose of ejecting the fini'shed castings therefrom.

In the embodiment herein illustrated and described, the castings 52 being formed on the machine each consist of a previously formed insert 54 (Fig. 4) which may be o f brass or other metal, or of other material,

about which is formed a cast portion 55 of ca'st metal. i

In the operation of lthe apparatus above described, the movable die half 34 being in the position shown in full lines in the drawings, the lever 48 is moved to the position indicated at 56 in dotted lines in Fig. 2, thereby retracting the ejector pins 50, and inserts 54 are inserted in the bores of the die half 34. The movable bolster plate 24 and movable die 'half 84, together with die shoe 37, cams 21, lever 48, ejector plate 40 and the parts associated therewith, are then advanced, by known power means not shown, until lever 48 reaches the position 57 and the movable die half reaches the position indicated at 38 in F ig. '2, thereby bringing the two die halves 'into operative relation. The molten metal visV thenintroduced into the molds in the known manner, whereit solidifies to form As lever 48 approaches the position indicated at 57 in Fig. 2, cam 21 engages roller 30'and moves stop member 16 outwardly until it lies in the vpath of lever 48. The movable bolster plate 24 and the other reciprocable parts are then retracted by the power means, and are moved to the position shown in full lines in the drawings. During the retraction, stop member 16 contacts with lever 48 and causes it to rotate about shaft 46, thereby actuating rack 44 and causing the ejector pins 50 to force i the castings 52 out of their molds in the manner indicated at Fig. 2. As the reciprocating mechanism approaches the rearward limit of its stroke, cam 22 engages roller 30 and moves stop member 16 to inoperative position, whereupon the operator moves lever 48 forwardly if Vnecessary to complete the ejection of the castings, and then moves it rearwardly to the position indicated at 56 to permit the insertion of another set of inserts preparatory to repeating the process. Because of the fact that it is a slow and difiicult 'ta-sk to loosen the castings from the 1. In a die casting machine having a reciprocating die member, means for reciprocating the die member, and means for ejecting the castings from the die member, including a lever pivotally related to the die member and operative to actuate the ejecting means and a stop member movable into contacting relation with the lever to actuate it and'movable out of contacting relation with the lever to permit the lever to be manually manipulated.

2. In a die casting machine having a reciprocabie die member, a stop member, means operated by the reciprocation of the die member for moving the stop member to operative and inoperative positions,and ejecting means controiled by the position of the stop member for' ejecting the castin'gs from the die member and manually operable when the stop member is moved to its inoperative position.

8. In a die casting machine having a reciprocable die membeij-a. stop member, cam means operated by reciprocation of the die member for moving the'stop member to opierative and inoperative positions, and ejectmg means adapted tobeactuated by the. stop member.

4. In a die casting machine having a reciprocable die mechanism, a stop member movable transversely of the direction of reciprocation of the die mechanism into operative and inoperative positions, cam means movable with the die mechanism for actuating the stop member, and ejecting mechanism comprising 'an element pivotally related to the die mechanism and adapted to cooperate with the stop member to eject the finished castings from the die. mechanism.

5. In a die casting machine havinga reciprocating diemember movable through a cycle of operation, a stop member, ejecting means adapted to be actuated by the stop member upon movement of the die member7 and means rendering the stop member operative durmg movement of the die member through one. part of its cycle and inoperative during movement of the die member through another part of its cycle.

6. In a die casting machine having a stationary die member and a reciprocating die member, a stop member, manually operable ejecting means adapted to be actuated by the stop member, means for moving the stop member to an operative position during movement of the reciprocating die member toward the stationary die member, and means for moving the stop member to an inoperative position during movement' of the reciprocating die member away from the stationary die member to permit manual manipulation of the ejecting means. o

7. In a die casting machine having a stationary die member and a reciprocating die member, a stop member, ejecting means comprising a manually operable member reciprocating with the reciprocating die member and adapted to be actuated by the stop member, means for moving the stop member into the path of the manually operable member during movement of the reciprocating die member toward the stationary die member, and means for moving the stop member out of the path of the manually operable member during movement of the reciprocating die member away from the stationary die member to permit manual manipuiation of the ejecting means.

8. In a. die casting machine having a stationary die member and a reciprocating die member provided With an aperture designed to receive inserts to be embedded in the casting, a stop member, ejecting means adapted to be aetuated byV the stop member upon movement of the reciprocat'ing die member and including an ejecting member movable in said aperture to force the insert and casting from the movable die member, and means rendering the stop member operative during movement of the die member in one direction and inoperative during movement of the die member in another direct-ion.

In witness Whereof, we hereunto Subscribe our names this 14th day of December, A. D.

ALFRED G. RAVENSCHLAG. FRANCIS P. TIKALSKY. 

